c# excel Interop.XlDVType.xlValidateList AutoComplete IncellDropDown

问题

I am able to get dropdown in a cell using the code below

               Interop.Range validationAddressRange = ws.Worksheet.get_Range(startAddress, endAddress);
                validationAddressRange.Select();
                validationAddressRange.Cells.Validation.Delete();
                validationAddressRange.Cells.Validation.Add(Type: Interop.XlDVType.xlValidateList, 
                AlertStyle: Interop.XlDVAlertStyle.xlValidAlertStop, Formula1: formula);
                validationAddressRange.Cells.Validation.IgnoreBlank = true;
                validationAddressRange.Cells.Validation.InCellDropdown = true;
                validationAddressRange.Cells.Validation.ErrorMessage = "Invalid entry. Click 'Retry' to update the cell value, or 'Cancel' to undo the change made to the cell.";
                validationAddressRange.Cells.Validation.ErrorTitle = "Invalid Data Error";
                validationAddressRange.Cells.Validation.ShowError = true;
                ws.Worksheet.Cells[1,1].Select(); //selects the top-leftmost cell since excel doesn't furnish a de-select option.

Does anyone know how to tie in events and have autocomplete feature just like a regular windows form combobox?

回答1:

Here, I tried to solve this. it works for me.

var list = new System.Collections.Generic.List<string>();
list.Add("RFP");
list.Add("2nd Review");
list.Add("RESHOOT");
var flatList = string.Join(", ", list.ToArray());

var cell = (Microsoft.Office.Interop.Excel.Range)oSheet.Cells.get_Range("B1");;
cell.Validation.Delete();
cell.Validation.Add( XlDVType.xlValidateList,
    XlDVAlertStyle.xlValidAlertInformation,
    XlFormatConditionOperator.xlBetween,
    flatList,
    Type.Missing);

Here, It will work when you will fill the cells from first to last continuously without leaving any cell. if you will fill the cell in the middle. It will not work.

来源：https://stackoverflow.com/questions/18899730/c-sharp-excel-interop-xldvtype-xlvalidatelist-autocomplete-incelldropdown